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A magnetic manipulator for studying local rheology and micromechanical properties of biological systems
Abstract
A magnetic micromanipulator capable of generating two-dimensional translational and rotational motions on a microscope stage is described. With 3 μm-diam paramagnetic beads, forces in the piconewton range and torques on the order of 10−14 N m are obtained and can be modulated in time at moderate frequencies (<5 Hz). Typical magnetic fields between 0.1 and 0.2 T, and gradients between 10 and 20 T m−1 are created by four independent feedback-controlled electromagnets. Video microscopy and computerized image analysis are used to locate the beads on each image with a resolution of 0.1 pixel (20 nm). The device is primarily designed to study, at a microscopic scale, the local mechanical properties of biological polymers such as actin in solution, and of cell cytoplasm. Possible applications include the in situ manipulation of intracellular organelles.
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Cited by
OctoMag: An Electromagnetic System for 5-DOF Wireless Micromanipulation
Kummer, M. P., Abbott, J. J., Kratochvil, B. E., Borer, R., Sengul, A., & Nelson, B. J. (2010) · IEEE Transactions on Robotics · doi:10.1109/tro.2010.2073030 · Cited by 1,161
Measurement of Local Viscoelasticity and Forces in Living Cells by Magnetic Tweezers
Bausch, A. R., Möller, W., & Sackmann, E. (1999) · Biophysical Journal · doi:10.1016/s0006-3495(99)77225-5 · Cited by 788
Magnetic nanomaterials for wireless thermal and mechanical neuromodulation
Signorelli, L., Hescham, S. A., Pralle, A., & Gregurec, D. (2022) · iScience · doi:10.1016/j.isci.2022.105401 · Cited by 32
Metadata
- Authors
- Amblard, F., Yurke, B., Pargellis, A., & Leibler, S.
- Venue
- Review of Scientific Instruments
- Publisher
- AIP Publishing
- Published
- 1996-03-01
- Volume
- 67
- Issue
- 3
- Pages
- 818-827
- ISSN
- 0034-6748 (ISSN-L)
- 1089-7623
- OpenAlex
- W1971724638
- Cited by
- 191
- References
- 0
- FWCI
- 1.92
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: A magnetic manipulator for studying local rheology and micromechanical properties of biological systems. https://app.cochat.ai/papers/10.1063/1.1146816
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- Amblard, F., Yurke, B., Pargellis, A., & Leibler, S. (1996). A magnetic manipulator for studying local rheology and micromechanical properties of biological systems. Review of Scientific Instruments. https://doi.org/10.1063/1.1146816
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